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authorSamuel Thibault <samuel.thibault@ens-lyon.org>2020-11-29 20:35:23 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-11-30 09:20:32 +0100
commitf0992098cadb4c9c6a00703b66cafe604e178fea (patch)
tree46ba746d25bb147727c739d61d1aaac35a7b40f3 /drivers/tee/Kconfig
parentb65054597872ce3aefbc6a666385eabdf9e288da (diff)
speakup: Reject setting the speakup line discipline outside of speakup
Speakup exposing a line discipline allows userland to try to use it, while it is deemed to be useless, and thus uselessly exposes potential bugs. One of them is simply that in such a case if the line sends data, spk_ttyio_receive_buf2 is called and crashes since spk_ttyio_synth is NULL. This change restricts the use of the speakup line discipline to speakup drivers, thus avoiding such kind of issues altogether. Cc: stable@vger.kernel.org Reported-by: Shisong Qin <qinshisong1205@gmail.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Tested-by: Shisong Qin <qinshisong1205@gmail.com> Link: https://lore.kernel.org/r/20201129193523.hm3f6n5xrn6fiyyc@function Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tee/Kconfig')
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